Method of treating copied plans

ABSTRACT

A method of treating the surface of copied plans with a creamy solution containing glue or gelatine as the main ingredient and another solution of a double salt so as to form film on the surface of copied plans, thereby preventing the copied plans from being stained easily and making them more durable.

United States Patent Kadono et a1.

[ Dec. 16, 1975 METHOD OF TREATING COPIED PLANS Inventors: Yahiko Kadono; Yanosuke Kadono,

both of Suita, Japan Assignee: Kadono Chemical Laboratory Co.,

Ltd., Suita, Japan Filed: Oct. 19, 1973 App]. No.: 407,983

Foreign Application Priority Data May 30, 1973 Japan 48-61352 [56] References Cited UNITED STATES PATENTS 2,335,333 11/1943 Wysong 117/15 2,676,116 4/1954 Pohl 1 117/164 X 2,950,214 8/1960 Smith 1 117/62.2 3,297,472 1/1967 Gilman et a1. 117/62.2 3,655,427 4/1972 Smith et a1...... 117/2 R X 3,839,066 10/1974 Brenner 117/6 R1I,113 9/1890 Brown 117/6 Primary ExaminerRalph Husack Attorney, Agent, or FirmWenderoth, Lind & Ponack [57] ABSTRACT A method of treating the surface of copied plans with a creamy solution containing glue or gelatine as the main ingredient and another solution of a double salt so as to form film on the surface of copied plans, thereby preventing the copied plans from being stained easily and making them more durable.

4 Claims, No Drawings METHOD OF TREATING COPIED PLANS This invention relates to a method of treating copied plans, which are used chiefly in a machine shop and in the field of civil engineering and construction, so as to prevent copied plans from being stained or damaged in use.

In machine shops, and in the field of construction and the like, work is executed in accordance with plans made out beforehand. Such plans show thereon, dimensions, hints on construction and other matters, serving as a guide to field engineers. Although such copied plans are handled with care, they are apt to be stained with machine oil, paint, thumbmarks and so on at the field of work, with the result that figures and letters on them become unclear and causes inconvenience, and in some cases, it is required to make fresh copies from the original again. Labor and costs of recopying many sheets of plan are not negligible.

The present invention has for its object the elimination of the above-mentioned disadvantages.

According to the present invention, a creamy solution in which glue or gelatine is compounded with high class fatty acid group alcohols, cetyl alcohol, stearyl alcohol, surface active agents, polyethylene glycol, spermaceti, white wax and IBOTA wax, is thinly applied to the surface of plans copied from the original. After the applied solution has dried, the copied plans, with the first film formed thereupon, are further treated with a double salt of an alkali sulfate and a metallic sulfate, such as, a solution of iron alum, chrome alum, aluminium alum, ammonium alum and so on. When this solution has dried, the copied plans are then ready to be used. Since the copied plans thus-treated have film on their surface, they are improved in durability and do not tear easily. Even if the copied plans thus-treated are stained with machine oil, paint, thumbmarks or the like, such stains can be wiped off easily with paper or waste cloth moistened with organic solvent, such as lacquer thinner, if such stains are attributed to fluid paraffin, mineral white oil, paint or the like. In the case where correction is necessary for the copied plans thustreated, the film may be stripped by a pen nib or the like at the portion where correction is required. After the correction has been made, the above-mentioned solutions may be applied again to the corrected portion for reproduction of film thereon. Thus, this method is a valuable invention.

Two embodiments of the present invention are shown below. The parts described in the specific embodiments refer to parts by weight.

Embodiment No. l

The 1st solution is prepared according to the following recipe:

Glue 5 parts Water 30 parts To dissolve the above by heating and to render it creamy, compound the following therewith:

Stearyl alcohol 6 parts Surface active agent 6 parts (Aquarex ME made by Du Pont) Polyethylene glycol 2 parts Alcohol solution of paraoxybutyl benzoate 0.5 part Water 70 parts The 2nd solution is an aqueous solution of Iron alum 3 parts Water 100 parts.

The 3rd solution isliquid paraffin.

The first solution is thinly applied to plans copied from the original. After drying, a second solution is then applied. Upon drying of the second applied solution, the copied plans are ready for use. In thecase where copied plans thus-treated are soiled, stains can be wiped off easily with soft paper or waste cloth moistened with the third solution. In the case where correction is necessary for copied plans thus-treated, the film may be stripped at the portion where correction is required. After the required correction has been made, the stripped off portion is again applied with the first solution and the second solution for reproduction of a film thereon. Stains are wiped off with either liquid paraffin or lacquer thinner, according to the nature of the stain.

Embodiment No. 2

The lst solution is prepared according to the following recipe:

Gelatine 6 parts Water 30 parts To dissolve the above by heating and to render it creamy, compound the following therewith:

Cetyl alcohol 7 parts Surface active agent -(Aquarex ME made by Du Pont) 6 parts Spennaceti, IBOTA wax 7 parts Polyethylene glycol 2 parts Alcohol solution of paraoxybutyl benzoate 0.5 part Water parts The 2nd solution is an aqueous solution of Chrome alum 3 parts Water parts.

The 3rd solution is mineral white oil or lacquer thinner.

These solutions are used in the same way as in the case of Embodiment No. 1. Either mineral white oil or lacquer thinner, or, both of them are used for removing stains, according to the nature of stain.

What is claimed is:

1. A method of coating the surface of copied plans to prevent staining and to make them more durable, which comprises the steps of first, applying to the surface of the copied plans, an aqueous creamy mixture of glue or gelatine as the principal ingredient, which has been compounded with effective amounts of a surface active agent, a polyethylene glycol, paraoxybutyl benzoate and further cetyl alcohol, stearyl alcohol or spermaceti; drying the surface to form a first film thereon, and applying a second aqueous solution of ammonium alum, iron alum, chromium alum or aluminum alum on the surface of the first film to form a second film on the copied plans.

2. A method according to claim 1, wherein the thuscoated copied plans are corrected by erasing and wherein the corrected portion thereof, is further coated by forming a first and second film on the surface thereof, according to the steps of claim 3.

3. A method according to claim 1, wherein the first mixture is prepared from 5 parts by weight of glue, 30 parts by weight of water, 6 parts by weight of stearyl alcohol, 6 parts by weight of a surface active agent, 2 parts by weight of polyethylene glycol, 0.5 part by weight of an alcohol solution of paraoxybutyl benzoate, and 70 parts by weight of water and the second aqueous solution is prepared from 3 parts by weight of iron 3 4 alum and 100 parts by weight of water. polyethylene glycol, 0.5 part by weight of an alcohol 4. A method according to claim 1, wherein the first solution of paraoxybutyl benzoate, and 70 parts by mixture is prepared from 6 parts by weight of gelatine, weight of water and the second aqueous solution is prepared from 3 parts by weight of chrom alum and 100 parts by weight of water.

l l l parts by weight of water, 7 parts by weight of cetyl alcohol, 6 parts by weight of a surface active agent, 7 parts by weight of spermaceti, 2 parts by weight of 

1. A METHOD OF COATING THE SURFACE OF COPIED PLANS TO PREVENT STAINING AND TO MAKE THEM MORE DURABLE, WHICH COMPRISES THE STEPS OF FIRST, APPLYING TO THE SURFACE OF THE COPIED PLANS, AN AQUEOUS CREAMY MIXTURE OF GLUE OR GELATINE AS THE PRINCIPAL INGREDIENT, WHICH HAS BEEN COMPOUNDED WITH EFFECTIVE AMOUNTS OF A SURFACE ACTIVE AGENT, A POLYETHYLENE GLYCOL, PARAOYBUTYL BENZOATE AND FURTHER CETYL ALCOHOL, STEARYL ALCOHOL OR SPERMACETI, DRYING THE SURFACE TO FORM A FIRST FILM THEREON, AND APPLYING A SECOND AQUEOUS SOLUTION OF AMMONIUM ALUM, IRON ALUM, CHROMIUM ALUM ORALUMINUM ALUM ON THE SURFACE OF THE FIRST FILM TO FORM A SECOND FILM ON THE COPIED PLANS.
 2. A METHOD ACCORDING TO CLAIM 1, WHEREIN THE THUS-COATED COPIED PLANS ARE CORRECTED BY ERASING AND WHEREIN THE CORRECTED PORTION THEREOF, IS FURTHER COATED BY FORMING A FIRST AND SECOND FILM ON THE SURFACE THEREOF, ACCORDING TO THE STEPS OF CLAIM
 3. 3. A method according to claim 1, wherein the first mixture is prepared from 5 parts by weight of glue, 30 parts by weight of water, 6 parts by weight of stearyl alcohol, 6 parts by weight of a surface active agent, 2 parts by weight of polyethylene glycol, 0.5 part by weight of an alcohol solution of paraoxybutyl benzoate, and 70 parts by weight of water and the second aqueous solution is prepared from 3 parts by weight of iron alum and 100 parts by weight of water.
 4. A method according to claim 1, wherein the first mixture is prepared from 6 parts by weight of gelatine, 30 parts by weight of water, 7 parts by weight of cetyl alcohol, 6 parts by weight of a surface active agent, 7 parts by weight of spermaceti, 2 parts by weight of polyethylene glycol, 0.5 part by weight of an alcohol solution of paraoxybutyl benzoate, and 70 parts by weight of water and the second aqueous solution is prepared from 3 paRts by weight of chrom alum and 100 parts by weight of water. 